A city-boy was hiking across some farmland, and one day he stumbled over a large field of wheat.
All the wheat was harvested already, except for 2 circular patches.
Just by, he finds the farmer and asks him: "Why haven't you harvested all the wheat?"
"Well kid, that closest circular patch is where I first time had sex."
"Oh, I see. What about that other one?" the kid asks.
"That's where the mother stood watching."
the farmer replies.
"Oh my God! What did she say?!"
"Moooo....."